JP2509186B2 - Code conversion method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] A means for generating a separate key code according to a shift state is adopted, and a code conversion determined by a relationship between the key code and the setting states of a shift key and an input method designation key is performed. A code conversion table for storing control data and conversion output code for converting the key code into the conversion output code is read from the shift state management register, the input method control register and the code conversion table by the keyboard processing unit. The key code is converted into the output code in response to the control data.

[Industrial applications]

The present invention relates to a code conversion method, and more specifically,
The present invention relates to a code conversion method in which the conversion means of a key code into a character code or a control code is improved.

The key code, which is connected to the data processing device via the terminal device and sends various information, is provided with a plurality of keys, but the number of keys is limited due to the operability and compactness of the keyboard. , I have a request to input a lot of information from those keys.

As one means for satisfying these contradictory requirements, the information input key is associated with a shift key or the like, and more information is input from a smaller number of information input keys than information that can be input by itself. I am able to enter.

[Conventional technology]

One conventional input method of the above-mentioned information is as shown in FIGS. 7 and 8.

Depending on the key code from the keyboard 30, the corresponding key type bit and table number are the key code table.
Output from 38 (Fig. 9). If the pressed key is the control key (N in step S20 in FIG. 8), the key type bit is "1", and the control code table 40 (FIG. 10) is referred to by the table number. The control code is output (step S22 in FIG. 8).

If the pressed key is a character key, the key type bit is "0", the character code table 42 (Fig. 11) is referred to by the output table number, and the shift state management register 34 among them is referred to. The 2-byte character code or the Roman alphabet input alphabet code determined by the shift information is used for conversion (steps S24 to S46 in FIG. 8).

After that, processing for the input method for the input key is performed. That is, the input method specification information in the input method control register 36 is referred to determine whether the input is normal input or Roman alphabet input (step S48 in FIG. 8).

If it is a normal input (Y in step S48 in FIG. 8), input is possible or impossible (2 for impossible) by the 2-byte character code output from the character code table 42.
Byte character code is X'0000)
If input is possible, the corresponding output is performed (step S50 in FIG. 8).

If it is a roman character input (N in step S48 in FIG. 8), the shift information in the shift state register 34 is referred to and if it is an alphanumeric shift or an alphabet symbol shift (Y in step S52 in FIG. 8). , Performs the same processing as for normal input.

If the shift information in the shift state register 34 is a kana / kana symbol shift (Y in step S54 in FIG. 8), refer to the symbol input check table (see FIG. 12) with the key code from the press input key. If the input is possible or not (Y in step S56 in FIG. 8), the process proceeds to the same process as the normal input.

In the case of Hiragana / Katakana shift, if it is possible to input with the key code from the press input key, refer to the first direct input check table (Fig. 13) or determine if it is possible or not. In this case (Y in step S58 in FIG. 8), the same processing as in the case of normal input is performed. If input is not possible (N in step S58 in FIG. 8), the second direct input check table 48 (14th step) using the alphabet code output from the character code table 42 as described above.
When a code match is obtained by scanning (FIG. 8) (Y in step S62 in FIG. 8), the corresponding 2-byte code in the table 48 is output as a 2-byte character code.

When no code match is obtained by the above scanning, that is, when direct input is not possible (Y in step S60 in FIG. 8), the above-mentioned output alphabet code is input with reference to the alphabet table 50 (FIG. 15). If input is possible after determining whether it is possible or not (step of FIG. 8)
The output code is the alphabet code of S64 Y).

Such a code conversion process is performed and the keyboard processing unit 32
The code output from is continuously used for the Kana-Kanji conversion unit (not shown).

[Problems to be solved by the invention]

As described above, three tables (key code table 38, control code table 4) are provided for code conversion if necessary before using the pressed input key code in the Kana-Kanji conversion unit.
0, character code table 42) is required, and in order to determine whether the code obtained using these tables can be input or not, it is determined according to the presence / absence of a shift to the press input key and the input method. Requires separate tables.

This not only causes an increase in hardware, but as is clear from the above description of the conversion process, the process of inputting or non-inputting after the code conversion, a different code (key code, 2-byte character code, (Alphabet code) can be processed only after it is involved, and additional code conversion processing may be required, which adds complexity to the processing and its processing efficiency is low. Has become.

The present invention has been created in view of such problems,
It is an object of the present invention to provide a code conversion method that reduces the amount of hardware and improves processing efficiency.

[Means for solving problems]

FIG. 1 shows a principle block diagram of the present invention. As shown in the figure, according to the present invention, in order to solve the above-mentioned drawbacks of the conventional method, a code generated from an input key is converted into a different key code according to a shift state, and the converted key code is converted into a predetermined conversion output code. Is to get. The present invention relates to a code conversion method for a keyboard having a plurality of character keys, a plurality of shift keys and an input method designation key, and an output code output from a pressed character key and shift information output from the pressed shift key. Key code generation table 12 for generating one key code determined according to the output code and the shift information in response to
A shift state management register 14 for setting shift information generated by pressing the shift key, an input method control register 16 for setting input method specifying information defeated by pressing the input method specifying key, and an input method In the case where information can be input in a certain shift of the shifts that can be set in a certain input method, and an information storage unit that stores the input permission / prohibition determination information for each shift that can be set in a key code for each input method A code storage unit that stores a conversion output code for shift information for identifying the certain shift in a readable manner with a key code for each of the settable shifts in the certain input method, the information storage unit, and There is provided a single code conversion table 18 and a keyboard processing unit 20 which are simultaneously read out by the same key code in the code storage unit. That.

When one character key of the plurality of character keys is desired to be used with a certain input method and a certain shift,
Inputting the input method specifying information for specifying the certain input method with the input method specifying key and the certain shift with the corresponding shift key of the plurality of shift keys to identify the certain input method. Set in the method control register 16, and set shift information for identifying the certain shift in the shift state management register 14, and output the input method designation information and the shift information to the keyboard processing unit 20, and An output code generated by pressing a certain character key and the shift information are output to the key code generation table 12 to generate a key code, and the key code is output to the keyboard processing unit 20. The keyboard processing unit 20 that has received the input method designation information, the shift information, and the key code determines the certain input method from the input method designation information, and uses the key code to display the single code conversion table 18. Based on the readability, the input permission / inhibition determination information corresponding to the input method determination result in the read content, the certain one of the pressures is pressed in the shift identified by the shift information set in the shift state management register. It is determined whether or not the output code of the character key can be converted, and based on the determination result, it is identified by the shift information set in the shift state management register among the plurality of conversion output codes read by the reading. Conversion output to output the shift and the conversion output code corresponding to the input method determination result to the pressed certain character key. The present invention is configured so as to output as a code.

[Work]

In the code conversion method of the present invention, when a character key of a plurality of character keys is used in a certain input method and a certain shift, the certain input method is designated by the force method designation key, Further, the certain shift is designated by a corresponding shift key of the plurality of shift keys.

Input method specifying information for identifying the specified certain input method is set in the input method control register 16, and shift information for identifying the specified certain shift is:
It is set in the shift state management register 14. The input method designation information and the shift information are output to the keyboard processing unit 20, and the output code and the shift information generated by pressing the certain one character key are input to the key code generation table 12. The key code is output and a key code is generated from the key code generation table 12, and the key code is output to the keyboard processing unit 20.

The keyboard processing unit 20 that has received the input method designation information, the shift information, and the key code determines the certain input method from the input method designation information, and uses the key code to display the single code conversion table 18. read out.

The certain character key pressed in the shift identified by the shift information set in the shift state management register based on the input enable / disable determination information corresponding to the input method determination result in the read content. It is determined whether or not the output code of is convertible. Based on the determination result, the shift identified by the shift information set in the shift state management register among the plurality of conversion output codes read by the reading and the conversion output code corresponding to the input method determination result are It is output as a conversion output code to be output for the pressed certain character key.

This conversion output code is a conventionally known Roman character processing unit,
It is used for processing in the Kana-Kanji conversion processing unit.

〔Example〕

FIG. 2 shows an embodiment of the present invention. In this figure,
Reference numeral 10 denotes a keyboard. Although not explicitly shown on the keyboard 10, input keys (character keys, control keys), various shift keys, and an input method designation key are arranged on the upper surface of the keyboard. A shift state management register 14 'for setting the shift information when is pressed,
Press input key output code to shift state management register 14 '
Predetermined bit configuration determined according to the shift information of, for example, 1
Key code output table to output byte key code
12 and are provided.

Reference numeral 20 denotes a keyboard processing unit, which controls processing described later. The conversion output code output from the keyboard processing unit 20 is used for processing in a well-known Roman character processing unit and kana-Kanji processing unit (not shown). It

Reference numeral 14 ″ is a shift state management register in which, when the shift key on the keyboard 10 is pressed, the shift information corresponding to each shift key is set similarly to that set in the shift state management register 14 ′ via the keyboard processing unit 20 (first). (Fig. 3) In this register, only the bit corresponding to the shift key in use is set to "1", and the other bits are set to "0".

Reference numeral 16 is an input method control register in which the input method specifying information is set via the keyboard processing unit 20 when the input method specifying key on the keyboard 10 is pressed. This register is a 1-bit register. For example, when "0", a normal input is assigned, and when "1", a Roman character input is assigned.

18 is a code conversion table, the table structure is the fourth
It is as shown in the figure. The code conversion table shown in FIG. 4 is for a case where the key code consists of 1 byte. That is, the code conversion table has the key type bit part 18
A, first and second inputtable shift table units 18B, 18C,
It comprises first and second 2-byte code parts 18D and 18E and an alphabet code part 18F. Each of these units has a key type bit (for example, a bit for distinguishing a character key or a control key) in the key type bit unit 18A for each key code, and the first and second inputtable shift table units 18B, 18
In the case of C, an input possible shift flag as shown in the fifth case, in the case of the first 2-byte code part 18D, a normal input and a shift other than an alphabetic symbol shift, and a Roman character input in the case of an alphanumeric shift 2-byte character code, 2 bytes for the second 2-byte code part 18E in the case of normal input and alphanumeric shift and Roman character input other than alphanumeric shift and shifts other than hiragana / katakana shift The character code and the 1-byte code in the alphabet code section 18F are stored respectively.

The code conversion process in the embodiment of the present invention having the above configuration will be described below.

While pressing a certain letter key on the keyboard 10,
It is assumed that the shift key and the input method designation key for designating the shift function and the input method that the operator can give as necessary are pressed.

The shift information of the pressed shift key is set in the shift state management registers 1'and 14 ", and the input method designation information from the input method designation key is set in the input method control register 16.

Along with this processing, the output code of the pressed character key and the shift information of the pressed shift key are provided for reference to the key code generation table 12, and the pressed information determined from the key code generation table 12 according to the shift information is pressed. The key code corresponding to the output code of the character key is output.
For example, when the output code of the pressed character key is 1 byte of H. ^{▽ .11} and the hiragana shift is designated, the key code generation table 12 outputs a 1-byte key code of H. ^▽ .98.

In this way, the key code output from the keyboard 10 is subjected to a series of processes by the keyboard processing unit 20 as described below.

First, with reference to the code conversion table 18, it is determined whether the input key pressed is a character key or a control key (step S1 in FIG. 6). If the key type bit is "1" and it is a control key, the key code is output as a control code (step in FIG. 6).
S2).

If the key type bit is "0" and it is a character key, the following processing is performed.

By referring to the contents of the input method control register 16, it is judged whether or not the designated input method is normal input (step S3 in FIG. 6).

If normal input is specified, the contents of the shift state management register 14 ″ and the first inputtable shift table section 18B
It is judged whether it matches with the contents of (step S4 in FIG. 6),
It is determined whether input is possible. Character keys equipped on the keyboard that cannot be used as characters to be used in relation to the shift state information and the input method are the pressed key and the shift state information and the input method information. The existing ones when viewed are those that cannot be entered. If it can be input, it is determined whether or not the shift information indicates an alphabetic symbol shift by referring to the contents of the shift state management register 14 ″ (step S5 in FIG. 6). If so, the 2-byte code from the second 2-byte code section 18E is output as a 2-byte character code (for the English symbol) (step S6 in FIG. 6), but if not, the first 2-byte code is output.
The 2-byte code from the bytecode section 18D is output as a 2-byte character code (step S7 in FIG. 6).

If Romaji input is designated by referring to the input method control register 16 described above, the shift state management register 1
The contents of 4 ″ and the contents of the second inputtable shift table portion 18C are judged to be coincident (step S8 in FIG. 6) to judge whether or not the input is possible. If the input is possible, the contents of the shift state management register 14 ″ are referred to and it is determined whether or not the shift information indicates an alphanumeric shift (step S9 in FIG. 6). When the alphanumeric shift is indicated, the 2-byte code from the first 2-byte code section 18D is output as a 2-byte character code (alphanumeric 2-byte code) (step S10 in FIG. 6), but otherwise shifts. Whether or not the shift information indicates Hiragana / Katakana shift is determined by referring to the state management register 14 ″ (step S11 in FIG. 6), and if not, the second 2-byte code. The 2-byte code from section 18E is output as a 2-byte character code (2-byte code of English symbol, Kana symbol, or Kana symbol) (step in FIG. 6).
S13). In the case of Hiragana / Katakana shift, the alphabet code from the alphabet code section 18F is output as a 1-byte code (step S13 in FIG. 6).

The converted code output from the keyboard processing unit 20 is transferred to a Kana-Kanji conversion unit (not shown).

In the above embodiment, the case where the key code is generated inside the keyboard has been described, but it may be generated outside the keyboard.

〔The invention's effect〕

As described above, according to the present invention, it is possible to perform code conversion and determination as to whether input is possible or not with one table reference, excluding the need for separate table reference according to the shift state and the input method, thus reducing hardware. At the same time, the processing is simplified and the processing efficiency is improved.

[Brief description of drawings]

FIG. 1 is a block diagram of the principle of the present invention, FIG. 2 is a diagram showing an embodiment of the present invention, FIG. 3 is a diagram showing set information set in a shift state management register, and FIG. 4 is a code conversion table. FIG. 5 is a diagram showing an example of the table configuration, FIG. 5 is a diagram showing registered contents of the first and second inputtable shift table portions of the code conversion table, FIG. 6 is a processing flow of the embodiment of FIG. 2, and FIG. Is a configuration diagram of a conventional code conversion unit, FIG. 8 is a processing flow for the code conversion unit in FIG. 7, FIG. 9 is a view showing a key code table, FIG. 10 is a view showing a control code table, and FIG. Shows a character code table, FIG. 12 shows a symbol input check table, FIG. 13 shows a first direct input check table, FIG. 14 shows a second direct input check table, Figure 15 shows the alphabet table It is to figure. In FIGS. 1 and 2, 12 is a key code generation table, 14, 14 ', 14 "are shift state management tables, 16 is an input method control register, 18 is a code conversion table, and 20 is a keyboard processing unit.

Claims (1)

(57) [Claims] 1. A code conversion system for a keyboard having a plurality of character keys, a plurality of shift keys and an input method designation key, wherein an output code output from a pressed character key and a shift output from a pressed shift key. A key code generation table 12 for generating one key code determined according to the output code and the shift information in response to information, and a shift state management register 14 for setting the shift information generated by pressing the shift key, The input method control register 16 for setting the input method specifying information generated by pressing the input method specifying key, and the input enable / disable judgment information for each shift that can be set in the input method are stored in a readable manner by a key code for each input method. The information storage unit and the input in a certain shift among the shifts that can be set in the certain input method A code storage unit that stores a conversion output code for shift information that identifies a certain shift when possible, in a readable manner with a key code for each of the settable shifts in the certain input method, A single code conversion table 18 and a keyboard processing unit 20 are provided, which are used to read the storage unit and the code storage unit with the same key code at the same time. When it is desired to use the certain input method and the certain shift, the certain input method is designated by the certain input method designation key, and the certain shift is designated by the corresponding shift key of the plurality of shift keys. The input method designating information for identifying is set in the input method control register 16 and the shift information for identifying the certain shift is set for the shift state management register. The input method designating information and the shift information to the keyboard processing section 20, and the output code generated by pressing the certain one character key and the shift information. table
12 to generate a key code, output the key code to the keyboard processing unit 20, and the keyboard processing unit 20 receiving the input method designation information, shift information and the key code, the input method designation information The certain input method is determined from the above, the single code conversion table 18 is read with the key code, and based on the input permission / inhibition determination information corresponding to the input method determination result of the read content. Determining whether or not the output code of the certain character key pressed in the shift identified by the shift information set in the shift state management register can be converted, and read by the reading based on the determination result. Of the plurality of converted output codes identified by the shift information set in the shift state management register and the input method determination result A code conversion device which outputs a conversion output code corresponding to the above as a conversion output code to be output to the pressed certain character key.